Our company has standardized on SharpSetup for installation of all our software products. May I ask why development has stopped? Do you know of any alternatives? Would it be possible to get some instructions/source code in order to add support for Visual Studio 2017 ourselves?

6+ months later and the website still has links to "buy" the product (although they ultimately don't work) and no real announcement of its discontinuation. This has not been handled in a professional manner at all. If there's no plan to continue monetizing this product, it should be open sourced (or at least source code given to purchasers) so we can support ourselves.